2.2.0.7 true Regulatory Matters (Details) (USD $) 00610 - Disclosure - Regulatory Matters (Details) true false false false 1 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 EPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ false 2 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 3 USD false false Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ false 4 USD true false false false CEI [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi fe_SubsidiaryTwoMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 5 USD true false false false TE [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi fe_SubsidiaryThreeMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 6 USD true false false false JCP&L [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi fe_SubsidiaryFourMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 7 USD true false false false Met-Ed [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi fe_SubsidiaryFiveMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 8 USD true false false false Penelec [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi fe_SubsidiarySixMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 9 USD true false false false Transformerand Distibutionline [Member] us-gaap_PublicUtilityAxis xbrldi http://xbrl.org/2006/xbrldi fe_TransformerandDistibutionlineMember us-gaap_PublicUtilityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 10 USD true false false false Existing Program [Member] us-gaap_PublicUtilityAxis xbrldi http://xbrl.org/2006/xbrldi fe_ExistingProgramMember us-gaap_PublicUtilityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 11 USD true false false false Transformerand Capicitor [Member] us-gaap_PublicUtilityAxis xbrldi http://xbrl.org/2006/xbrldi fe_TransformerandCapicitorMember us-gaap_PublicUtilityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 12 USD true false false false Current Program [Member] us-gaap_PublicUtilityAxis xbrldi http://xbrl.org/2006/xbrldi fe_CurrentProgramMember us-gaap_PublicUtilityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 13 true false false false Percent [Member] fe_RegulatoryMattersMeasurementUnitsAxis xbrldi http://xbrl.org/2006/xbrldi fe_PercentMember fe_RegulatoryMattersMeasurementUnitsAxis explicitMember Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 false 14 true false false false Percent [Member] fe_RegulatoryMattersMeasurementUnitsAxis xbrldi http://xbrl.org/2006/xbrldi fe_PercentMember fe_RegulatoryMattersMeasurementUnitsAxis explicitMember Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 false 15 true false false false Percent [Member] fe_RegulatoryMattersMeasurementUnitsAxis xbrldi http://xbrl.org/2006/xbrldi fe_PercentMember fe_RegulatoryMattersMeasurementUnitsAxis explicitMember Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 false 16 true false false false Kv [Member] fe_RegulatoryMattersMeasurementUnitsAxis xbrldi http://xbrl.org/2006/xbrldi fe_KvMember fe_RegulatoryMattersMeasurementUnitsAxis explicitMember Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 false 17 true false false false MWH [Member] fe_RegulatoryMattersMeasurementUnitsAxis xbrldi http://xbrl.org/2006/xbrldi fe_MwhMember fe_RegulatoryMattersMeasurementUnitsAxis explicitMember Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 false 18 true false false false MWH [Member] fe_RegulatoryMattersMeasurementUnitsAxis xbrldi http://xbrl.org/2006/xbrldi fe_MwhMember fe_RegulatoryMattersMeasurementUnitsAxis explicitMember MWH Standard http://firstenergycorp.com/20100930 MWH fe 0 false 19 true false false false MWH [Member] fe_RegulatoryMattersMeasurementUnitsAxis xbrldi http://xbrl.org/2006/xbrldi fe_MwhMember fe_RegulatoryMattersMeasurementUnitsAxis explicitMember Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 false 20 true false false false MWH [Member] fe_RegulatoryMattersMeasurementUnitsAxis xbrldi http://xbrl.org/2006/xbrldi fe_MwhMember fe_RegulatoryMattersMeasurementUnitsAxis explicitMember Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 false 21 true false false false MWH [Member] fe_RegulatoryMattersMeasurementUnitsAxis xbrldi http://xbrl.org/2006/xbrldi fe_MwhMember fe_RegulatoryMattersMeasurementUnitsAxis explicitMember Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 false 22 USD true false false false OE [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi fe_SubsidiaryOneMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ 5 Regulatory Matters (Textuals) 3 fe_RegulatoryMattersTextualsAbstract fe false na duration Regulatory Matters. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false xbrli:stringItemType string Regulatory Matters. false 6 Increase electric distribution rates 4 fe_IncreaseElectricDistributionRates fe false debit instant Increase electric distribution rates. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 true true false false 136600000 136600000 false false false 4 true true false false 29200000 29200000 true false false 5 true true false false 38500000 38500000 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 true true false false 68900000 68900000 true false false xbrli:monetaryItemType monetary Increase electric distribution rates. No authoritative reference available. false 7 Total annual energy savings 4 fe_TotalAnnualEnergySavings fe false na duration Total annual energy savings. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false true false false 530000 530000 true false false 18 false true false false 470000 470000 true false false 19 false true false false 410000 410000 true false false 20 false true false false 290000 290000 true false false 21 false true false false 166000 166000 true false false 22 false false false false 0 0 true false false xbrli:integerItemType integer Total annual energy savings. No authoritative reference available. false 8 Utilities required to reduce peak demand in 2009 (In Percentage) 4 fe_UtilitiesRequiredToReducePeakDemand fe false na duration Utilities required to reduce peak demand in 2009 in percentage. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false true false false 1 1 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false xbrli:pureItemType pure Utilities required to reduce peak demand in 2009 in percentage. No authoritative reference available. false 9 Utilities required to additional reduction in peak demand through 2018 4 fe_UtilitiesRequiredToReducePeakDemandFromTwoThousandTenToTwoThousandEighteen fe false na duration Utilities Required to Reduce Peak Demand From 2010 To 2018 in percentage false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 <p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Arial;font-size:9pt;margin-left:0px;">0</font><font style="font-family:Arial;font-size:9pt;">.75</font></p> 0.75 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false us-types:textBlockItemType textblock Utilities Required to Reduce Peak Demand From 2010 To 2018 in percentage No authoritative reference available. false 10 Transmission cost projections 4 fe_ProjectedTransmissionCost fe false debit duration Projected Transmission Cost. false false false false false false false false false false false verboselabel false 1 false true false false 199700000 199700000 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false true false false 158500000 158500000 true false false 8 false true false false 41200000 41200000 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false xbrli:monetaryItemType monetary Projected Transmission Cost. No authoritative reference available. false 11 Deferred projected cost 4 fe_DeferredProjectedCost fe false debit instant Deferred Projected Cost. false false false false false false false false false false false verboselabel false 1 false true false false 3000000 3000000 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false xbrli:monetaryItemType monetary Deferred Projected Cost. No authoritative reference available. false 12 Minimum reduction in Utilities peak demand (In Percentage) 4 fe_MinimumReductionInUtilitiesPeakDemand fe false na instant Minimum reduction in Utilities peak demand. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false true false false 0.045 0.045 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false us-types:percentItemType pure Minimum reduction in Utilities peak demand. No authoritative reference available. false 13 Minimum reduction in Utilities reduce energy consumption (In Percentage) 4 fe_MinimumReductionInUtilitiesReduceEnergyConsumption fe false na instant Minimum reduction in Utilities reduce energy consumption. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false true false false 0.03 0.03 true false false 15 false true false false 0.01 0.01 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false us-types:percentItemType pure Minimum reduction in Utilities reduce energy consumption. No authoritative reference available. false 14 Updated estimated decommissioning costs 4 fe_UpdatedEstimatedDecommissioningCosts fe false debit instant Updated estimated decommissioning costs. false false false false false false false false false false false verboselabel false 1 false true false false 729000000 729000000 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false xbrli:monetaryItemType monetary Updated estimated decommissioning costs. No authoritative reference available. false 15 Previously estimated decommissioning costs 4 fe_PreviouslyEstimatedDecommissioningCosts fe false debit instant Previously estimated decommissioning costs. false false false false false false false false false false false verboselabel false 1 false true false false 528000000 528000000 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false xbrli:monetaryItemType monetary Previously estimated decommissioning costs. No authoritative reference available. false 16 Infrastructure and energy projects 4 fe_InfrastructureAndEnergyProjects fe false debit instant Infrastructure and energy projects. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false true false false 98000000 98000000 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false true false false 40000000 40000000 true false false 10 false true false false 34000000 34000000 true false false 11 false true false false 11000000 11000000 true false false 12 false true false false 13000000 13000000 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false xbrli:monetaryItemType monetary Infrastructure and energy projects. No authoritative reference available. false 17 New Voltage transmission facilities across PJM and a zonal transmission rate (In KV) 4 fe_NewVoltageTransmissionFacilitiesZonalTransmissionRate fe false na duration New Voltage transmission facilities and zonal transmission rate. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false true false false 500 500 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false xbrli:integerItemType integer New Voltage transmission facilities and zonal transmission rate. No authoritative reference available. false 18 Assessment period costs 4 fe_AssessmentPeriodCosts fe false debit duration Assessment period costs. false false false false false false false false false false false false 1 false true false false 29500000 29500000 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false xbrli:monetaryItemType monetary Assessment period costs. No authoritative reference available. false 19 Regulatory asset impairment related to Electric Security Plan 4 fe_RegulatoryAssetImpairmentRelatedToElectricSecurityPlan fe false credit instant Regulatory asset impairment related to Electric Security Plan. false false false false false false false false false false false false 1 false true false false 39500000 39500000 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false xbrli:monetaryItemType monetary Regulatory asset impairment related to Electric Security Plan. No authoritative reference available. false 20 Costs avoided by customers 4 fe_CostsAvoidedByCustomers fe false debit duration Costs avoided by customers. false false false false false false false false false false false false 1 false true false false 360000000 360000000 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false xbrli:monetaryItemType monetary Costs avoided by customers. No authoritative reference available. false 21 Fund to assist low income customers 4 fe_FundToAssistLowIncomeCustomers fe false debit duration Fund to assist low income customers. false false false false false false false false false false false false 1 false true false false 12000000 12000000 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false xbrli:monetaryItemType monetary Fund to assist low income customers. No authoritative reference available. false 22 Generation discount for low income customers 4 fe_GenerationDiscountForLowIncomeCustomers fe false na duration Generation discount for low income customers. false false false false false false false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false true false false 0.06 0.06 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false us-types:percentItemType pure Generation discount for low income customers. No authoritative reference available. false 23 Decrease in amount recovered for costs incurred 4 fe_DecreaseInAmountRecoveredForCostsIncurred fe false credit duration Decrease in the amount recovered for costs incurred. false false false false false false false false false false false false 1 false true false false 180000000 180000000 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false xbrli:monetaryItemType monetary Decrease in the amount recovered for costs incurred. No authoritative reference available. false 24 Revised decommisioning costs 4 fe_RevisedDecommisioningCosts fe false debit duration Revised decommisioning costs. false false false false false false false false false false false false 1 false true false false 736000000 736000000 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false xbrli:monetaryItemType monetary Revised decommisioning costs. No authoritative reference available. false 25 Average Delivery Service Improvement Rider Collection Per Kilowatt Hours 4 fe_AverageDeliveryServiceImprovementRiderCollectionPerKilowattHours fe false debit duration Average Delivery Service Improvement Rider Collection Per Kilowatt Hours. false false false false false false false false false false false false 1 false true false false 0.002 0.002 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false xbrli:monetaryItemType monetary Average Delivery Service Improvement Rider Collection Per Kilowatt Hours. No authoritative reference available. false 26 Load Cap 4 fe_LoadCap fe false na duration Load Cap related to new ESP. false false false false false false false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false true false false 0.8 0.8 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false us-types:percentItemType pure Load Cap related to new ESP. No authoritative reference available. false 27 Load Served From Renewable Energy Resources 4 fe_LoadServedFromRenewableEnergyResources fe false na duration Load Served From Renewable Energy Resources. false false false false false false false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 0.0025 0.0025 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false us-types:percentItemType pure Load Served From Renewable Energy Resources. No authoritative reference available. false 28 Regional Transmission Organization Fees Integration Costs 4 fe_RegionalTransmissionOrganizationFeesIntegrationCosts fe false debit duration Regional Transmission Organization Fees Integration Costs. false false false false false false false false false false false false 1 false true false false 37000000 37000000 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false xbrli:monetaryItemType monetary Regional Transmission Organization Fees Integration Costs. No authoritative reference available. false 29 Annual Revenue Requirements In Zone 4 fe_AnnualRevenueRequirementsInZone fe false credit duration Annual Revenue Requirements In ATSI Zone related to Michigan Thumb Project. false false false false false false false false false false false false 1 false false false false 0 0 false false false 2 true true false false 16000000 16000000 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false xbrli:monetaryItemType monetary Annual Revenue Requirements In ATSI Zone related to Michigan Thumb Project. No authoritative reference available. false 22 25 false NoRounding UnKnown UnKnown false true